Did You Know Most Redheads Have Couperose Skin? If you're a natural-born redhead, you've probably put up with a fair share of harassment. You've been called carrot top countless times, you're constantly defending your freckly complexion — and if someone asks you if “the carpet matches the drapes” one more time, you'll scream. And now this: The world's largest sperm.
Aug 18, - Natural-born redheads have a biology unlike any other. It's the rarest hair color in the world, and with it comes a unique set of health consequences. Thanks to one genetic mutation and a few other mysterious causes, redheads have different pain tolerances, sexual encounters, and risks for disease than.